The Torah, “Leviticus” 2:13: And every meal-offering of thine shalt thou season with salt; neither shalt thou suffer the salt of the covenant of thy God to be lacking from thy meal-offering; with all thy offerings thou shalt offer salt.

The Torah attaches very great importance to salt. Even in our world, we see how important it is; it is impossible to live without it.

Salt is the world’s only natural preservative that keeps everything. People used to put salt on food products in order to preserve them. Today sugar is also added as a preservative to food, but this isn’t the natural method of preservation in which they used only salt.

Salt preserves everything, so it is called a covenant of salt, the union of salt. Because salt was dear in the past, its price was its weight in gold.

If I make a covenant with someone, such as the Creator, for example, by bringing Him bread as an offering, which means my corrected part, I have to bring bread with salt. This means that I have really corrected my desire.

Spiritually this means that I have reached the end of correction of a certain desire, which means that I have corrected the whole ego that was revealed in me at a certain point as altruism. At the same time, I also calculate that this correction isn’t final, and this is symbolized by the salt.
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From KabTV’s “Secrets of the Eternal Book” 11/27/13